서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1997)

김재홍,문득곤,김정수,김용준,임동진,박상훈,김희성,이민수,송기훈,김갑형,김형석,성소영,이인섭,김석우,황지환,조창근,김경문,부태성 대한화학요법학회 2000 대한화학요법학회지 Vol.18 No.3

Background : In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. Objective & Methods : For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1997. 99 strains of N. gonorrhoeae were isolated, among which 45(45.5%) were PPNG. Conclusion : The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 45.5% in 1997.

플라즈마 이온주입기에서의 시변환 쉬스 연구

김곤호,김건우,김영우,최영도,김종식,김상진,한승희,홍문표 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1

Abstract- In a plasma source ion implantation, the target is successively biased by negative voltage pulses with an intrinsic finite rise time, resulting in the time-dependent sheath formation around the target. Measurement of time-dependent sheath during the pulse rise show the ion matrix sheath development which is in proportion to square root of time and pulse rise rate over plasma density but independent of the ion mass.

개질아스팔트 콘크리트의 변형강도와 소성변형특성 연구

김광우,최선주,이문섭,홍상기,안경애,이순제 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-

본 연구는 정하중하에서 최대하중과 변형을 이용하여 구한 변형강도(K_(D))로부터 아스팔트 콘크리트의 소성변형 계수의 추정 가능성을 보여준다. 이 논문은 새로운 강도특성치인 K_(D)를 개발하는 김테스트 연구의 일부로 최근 2, 3단계의 연구결과이다. 19mm 편마암과 화강암 2가지 골재와 3가지 폴리머로 제조한 7가지 바인더로 같은 입도에서 소성변형 저항성이 다른 14가지 혼합물을 만들었다. 3단계에선 슬래브 공시체(30cm x 30cm x 6cm)를 제조후 반으로 나누어 한쪽 공시체에선 두 개의 김테스트 공시체 코어를 뜨고 다른 한쪽으로는 60℃ 반복주행(WT)시험을 수행하였다. 한편 2단계에선 슬래브 공시체의 가운데에서 WT 시험을 수행하고 그 양옆에서 김테스트 공시체 코어를 채취하였다. 4가지 하중봉을 사용하여 60℃에서 김 테스트를 수행하였다. 침하깊이-반복회수 곡선으로부터 최종 침하 깊이와 동적안정도 두 가지 소성변형 계수를 각 혼합물별로 구했다. 각 하중봉과 골재 별로 K_(D)와 소성변형 계수간의 통계적 상관관계 분석을 수행한 결과 K_(D)와 소성변형 계수와의 결정계수가 매우 높게(R² > 0.9) 나타났다. 그러므로 K_(D)는 소성변형 계수를 추정하는데 있어 매우 적합한 특성치이며 4cm 직경에 1cm 반경으로 원형절삭한 하중봉이 R² 가장 높게 나타나는 하중봉임을 알 수 있었다. 따라서 김테스트는 향후 소성변형을 추정하기 위한 표준화된 특성치로 사용할 수 있도록 더 연구 개발을 할 수 있을 것으로 판단되었다. This study shows predictability of rut parameters of asphalt concrete based on the deformation strength (K_(D)) which is obtained from the maximum load, deformation and size variables of loading head under simple static loading. This paper is the result of latest studies, phases 2 and 3, which are parts of Kim Test study for developing a new strength property, K_(D), for asphalt concrete. Two aggregates, gneiss and granite, with maximum size of 19mm and seven binders using three polymers(LDPE, SBS, SBR) were used to produce 14 different natures of rut resistance mixtures using the same gradation. A slab(30m x 30cm x 6m) was cut into two pieces and 2 cores for Kim test were taken from a half piece and the other piece was used for wheel tracking (WT) test at 60℃ in phase 3. In phase 2, WT test had been carried out in the middle of a whole slab and cores were taken from both sides of the wheel path along the center line. Kim test was performed using four loading heads at 60℃. Two rut parameters, depth of rut and dynamic stability, from the rut depth-cycle curve from a WT test were obtained for each mixture. Statistical analysis were performed for each loading head and aggregate to find out correlation between K_(D) values and each rut parameter. The analysis result showed that K_(D) had very high coefficient of determination (R² > 0.9) on the average with rut parameters. It was found that K_(D) is a good property that has excellent predictability for rut parameter of asphalt concretes, and the 4cm diameter loading head with 1cm curvature radius gave the best result in R². Therefore, Kim test can be further developed as a standard property for use in rut performance estimation of asphalt concretes.

초고층 건축물의 횡력 저항 시스템에 관한 연구

김영학,한범석,안종문,신성우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Recently residential tall buildings have been prosperous in Korea with the type of multi-used building since late 1990s. Although 6 buildings ranked in world tallest building Top 200 have been built in Seoul, over 100-stories building isn't presented yet. The characteristics of Korean super-tall buildings are described; ① located in Seoul city, Kyung-gi do Sung-nam city, and Busan city ② the height between 100m and 200m ③ multi-used building. The purpose of this study is to find out the behavior of tall building in point of displacement contribution factor calculated by the principle of virtual work. Consequently present the most effective members for controling lateral drift control by analysis using computer programs on a real structural model.

능동표적신호합성 알고리듬의 실시간 구현

김희성,김우식,최상문,한동훈,신기철,김재수 韓國海洋大學校 附設 海洋科學技術硏究所 1997 硏究論文集 Vol.6 No.-

The simulation of target-scattered echo with the moving sonar platform and target in 3-dimensional ocean environment is essential to validate and evaluate the performance of a sonar system. This paper presents the improved target signal simulation on the basis of the highlight(HL) model and its realtime algorithm. In order to simulate the scattering highlight, the highlight is represented as a directional scatterer. The realtime generation algorithm of the target signal is realized by use of DSP chip, TMS320C40, where the 40 channels are equally separated to form a parallel processing task in 4 processors. The presented realtime-version of target signal simulation can be used as a target signal simulator in the development of ACM(Acoustic Counter Measure) and advanced sonar signal processing techniques.

CBN 공구의 형상이 고경도강의 절삭특성에 미치는 영향

문상돈,김태영 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.5

The purpose of this investigation is experimentally to clarify the machinability and optimum tool geometry on milling of hardened STD11 steel. In the finish process of face milling of high hardened STD11 steel by CBN tool, the optimum tool shape is suggested, which can minimize the tool fracture and chipping by impact. It is measured that cutting force, tool wear and surface roughness generated during single-insert face milling using various geometric CBN tools. It has been found that the optimal chamfer angle of CBN too is about-25°and the suitable chamfer width is 0.2mm. The nose radius of tool is the most excellent at 1.2㎜ in the viewpoint of tool wear and surface roughness.

프랙탈 이론을 이용한 게시판 알고리즘의 설계 및 구현

문남원,박충희,김영민,이상준 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

We analyze bulletin board application currently used, and we propose the method that minimize disk I/O to enhance the I/O efficiency of the transmission of a large size of data. To improve the performance, we use fractal algorithm. Experiential result shows better performance than the other algorithm. Our next researches include the effort to improve the speed of computation by converting floating point operation to integer operation. And the method to enhance the precision of calculation is included also.

제왕절개술후 Fentanyl을 이용한 통증자가조절의 효과

김웅,김태환,조문성 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

계획된 제왕절개술을 받은 20명의 산모들을 대상으로 fentanyl을 이용한 정맥내 통증자가조절법(Intravenous patient-controlled analgesia:이하 PCA라 함)을 사용하여 술후 통증조절을 시행하고 VAS, 환자의 만족도, 부작용 등을 조사하였다. 각각의 환자에게 1.5mcg/kg의 fentanyl을 초회량으로 투여하였고 최대 유지용량은 1mcg/kg/hr로 하였다. 사용된 module의 주입 속도는 O.5ml/hr,lock-out interval은 15분이었다. 본 임상실험의 결과는 다음과 같았다. 1) VAS는 PCA시작전 8.18±.83에서 1시간 뒤에 3.15±0.49로 감소하였고, 그 뒤 계속 2∼4사이를 유지하였다. 2) 20명의 환자중 16명의 환자에서 대체로 만족하였다. 3) 부작용으로는 오심 및 구토, 소양증, 졸림증 등을 호소하였고 그정도가 비규적 경미하였다. 이상의 결과로 fentanyl을 이용한 술후 통증자가조절이 통증경감에 좋은 효과를 보이며 환자의 만족도가 높아 술후 통증조절의 유용한 방법이라 생각된다. Intravenous patient-controlled analgesia(PCA) is gaining wide spread popularity in the man agement of post-operative pain. Herein, We studies 20 patients, ASA class I or II, undergoing elective Cesarean section under general anesthesia. We examined post-operative pain control level with VAS, patinet's satisfaction and side effects associated with the use of fentanyl and Baxter infusor. Each patient received 1.5mcg/kg as loading dose and 1mcg/kg/hr of fentanyl as maximum maintenance dose. The module had a flow rate of O.5ml/hr and lock-out interval was 15 minutes. Results were as follow: VAS were 8.18±0.83(before PCA), 3.15±O.83(lhr after PCA) and maintained between 2-4 throughout 24hrs, 16 out of 20 patients were satisfied. Side effects such as nausea, pruritus, drowsiness were noted but with mild intensity. We recommend the use of PCA with fentanyl after surgery to improve post-operative pain because it provides adequate pain relief and high patient's satisfaction.

미적 경험을 활용한 과학 수업에서 중학생의 상상력과 과학의 심미성 탐색

문지영,손서진,김성원 이화여자대학교 교과교육연구소 2021 교과교육학연구 Vol.25 No.3

본 연구에서는 학생의 미적 경험을 강조한 수업을 개발하고 이 수업에 참여한 중학생들의 과학적 상상력의 변화 및 특성을 탐색하고 학생들이 인식한 과학의 심미성을 탐색하였다. 이를 위하여 이전 연구에서 수행한 교사들의 과학의 심미성과 미적 경험 수업에 대한 인식을 기반으로 수업 전략을 수립하였다. 이를 바탕으로 정규 수업 프로그램을 개발하고 경기도 소재 중학생 97명에게 16차시 수업을 진행하였다. 이전에 개발한 과학적 상상력 도구를 수정하여 수업 전후에 실시한 상상력 검사에서 유의한 상상력 변화를 확인하였고 하위요소인 정서적 이해에서 여학생에 비해 남학생이 유의하게 더 큰 폭의 향상을 가져왔다. 수업 후 학생들이 작성한 총 280회의 온라인 자유 게시글을 통해 수업에서 학생들이 경험한 상상력의 특성과 학생들이 인식한 과학의 심미성의 특성을 찾았다. 수업 프로그램의 내용과 활동에 따라 다르지만, 상상력은 정서적 이해와 연관성 발견이, 과학의 심미성은 외적형식미와 상호작용에 내재된 감정이 학생들에게 두드러지게 나타나는 특성을 보였다. 이 수업은 학생들에게 상상력을 자극하고 과학의 심미성을 통한 긍정적인 과학에 대한 태도를 보이고 있어 현장에 적극 활용할 필요성이 있다. In this study, the researchers developed a course that emphasized the aesthetic experience of students, explored the changes and characteristics of the scientific imagination of middle school students who participated in this class, and explored the aesthetics of science perceived by the students. To this end, teaching strategies were established based on the teachers' perceptions of the aesthetics of science and aesthetic experience classes conducted in the previous study. Based on this, a regular class program was developed and 16 classes were conducted for 97 middle school students in Gyeonggi-do. By modifying the previously developed imagination tools, significant changes in imagination were confirmed in the imagination test conducted before and after the class. Through a total of 280 free online postings written by students after class, the characteristics of imagination experienced by students in class and characteristics of aesthetics of science perceived by students were defined. Although it differs according to the contents and activities of the class program, the findings showed that imagination was connected to emotional understanding and the aesthetics of science helped students showed the external beauty of style and the emotions inherent in interaction.